Improvement in globe-clocks



T. R.A TIMBY. Globe` Clock.

No. 47,585. Patented May 1865.

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UNITED STATES PATENT OFFICE.

THEODORE R. TIMBY, OF SARATOGA SPRINGS, NEW YORK.

IMPROVEMENT IN GLOBE-CLOCKS.

Specification forming part of Letters Patent N0. 47,585, (lated May 2,i865.

T0 all whom, it may concern:

Be it known that I, THEO. R. TIMBY, of Saratoga Springs, in the countyTot' Saratoga and State of New York, have invented a new and ImprovedGlobeOlock and l do hereby declare that the following is a full, clear,and exact description thereof, which will enable those skilled in theart to make a 1d use the same, reference being had to the accompanyingdrawings, forming part of this specification, in which- Figure lrepresents a front elevation of this invention, partly in section. Fig.2 is a transverse vertical section of the same, the line x x, Fig. l,indicating the plane of section.

Similar letters ot reference indicate corresponding parts.

This invention consists in combining with a globe, revolving once intwenty-four hours under a stationary index, one or more hands revolvingupon a clock-dial in such a manner that by saidclock-dial and revolvinghands the local time is indicated in the usual man` ner, and at the sametime the globe and stationary index afford the means to read oit' thedifference of time in places of different longitude, or the differenceof the time between any place on the globe and the place where the clockis used.

A represents a terrestrial globe, the axle a of which is in a horizontalposition, having its bearings in segmental arms b, which are secured tothe case B, in which said globe or disk revolves. Motionv is imparted tothe globe A by means of a toothed ring, O, which is secured either tothe globe or to its axis in any suitable manner, and which is providedon its circumference with suitable cogs, that gear in a wheel, E, towhich motion is imparted by a clock-movement in the lower part ofthecase B. The motion ofthe ring O and globe A is so regulated that thesame revolve once in twenty-four hours, and in the drawings clamp-screwsd are used to secure the globe and disk together. The globe revolvesunder an index, F, which is rigidly attached to the case B in such aposition that it indicates the time when the sun culminates for anyplace on the globe situatedin the upper halt' of thc meridian which atthe time of observation coincides with the vertical plane passingthrough the axis of the globe and through said stationary index.

The lower part of the case B is occupied by an ordinary clock-dial, G,on which revolvrs the hour-hand e once in twelve hours, and theminute-handfonce every hour, in the usual manner. By means of thesehands and dial the local time of any place where the clocl; is used canbe read ott' at a glance the same as on any ordinary clock 5 and,furthermore, by the revolving globe and stationary index the differenceof the time in different localities cn the globe can be readilyascertained.

It is obvious that the clockmovement used to impart motion to the globecan be of any desirable lconstruction; but it must be remarked that anycom mon clock-1novement can be readily made to answer my purpose by theaddition of one simple cog-wheel. The entire globe clock, therefore, canbe manufactured cheap, and sold at such a low rate that it is withinreach of all. It affords a source oi' amusement and also of instructionfor young and old.

I claim as new and desire to secure by Letters Patent- A globe revolvingonce in twenty-four hours, in combination with a fixed dial and movinghands, substantially in the manner and for the purpose herein shown anddescribed.

v THEODORE R. TIMBY.

Witnesses:

WM. F. MONAMARA, C. L. TOPLIEE.

